Culinary-vessel heat-economizing and flame-protecting casing.



No. 877,349. PATENTED JAN. 21, 1908.

w. LITTLE, CULINARY VESSEL: HEAT BOONOMIZING AND FLAME PROTECTINGCASING.

APPLICATION FILED DEOA. 1905. RENEWED SEPT. 6. 1907- rns NORRIS PETERSco., wnsmncr WILLIAM LITTLE, OF BALLARAT, VICTORIA, AUSTRALIA.

CULINARY-VESSEL HEAT-ECONOMIZING AND FLAME-PROTECTING CASING.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed December 4:. 1905. Serial No. 290-293- RenewedSeptember 61 1907. Serial No. 391.697.

T 0 all whom it may concern:

Be it known that I, WILLIAM LITTLE, a subject of the King of GreatBritain and Ireland, &c., residing at Clarendon street, Ballarat, in theState of Victoria, Common- Wealth of Australia, have invented certainnew and useful Improvements in Culinary- Vessel Heat-Economizing and FlamePro tecting Casings; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable1 by a spirit lamp, wind enormously reduces the effective heat of theflame, driving it in various directions, while strong wind readily putssuch flame out. There 1s danger also in the use of unprotected flame inthe open in forests and grassy country, or in railway carriages.WVhether the flame be used out of doors or not the invention isapplicable, for it economizes heat and space, rendering it possible toconduct the operation of heating safely in a very small space.

The invention consists in the provision of an adjustable or removablejacket having details as hereinunder, and of such size that when placedaround the billy", kettle, or

vessel to be heated, there will be a particularly narrow space betweenthe vessel and the acket, which is itselfmainly double with theintervening space narrow. Within the base of the jacket is a collar ordeflector, there being wide intervening space, and air openings areprovided in the jacket base, so that air may enter said space fromwithout and pass upward to serve as a draft for, and director of theflame. The heated gases and the flame pass, as soon as they reach theedges of the bottom of the vessel to be heated, up between that vesseland the jacket. The heat is brought into intimate and prolonged contactwith the said vessel, not only at its bottom, but around and up itssides.

The space between the vessel and the j acketis provided withcorrugations, ribs, or distance pieces, to kee the vessel to be heatedcentral. The doub e jacket has-its internal space partly open near thetop and near the bottom as by means of slots to allow the passage ofair. It has also one or more side doors or closable apertures to allowof the contained lamp being set going, regulated, inspected andextinguished. The acket entirely prevents the escape of the fire within,acts as a safe guard against conflagrations, and against the blowing outof the flame, and is slotted where required to allow for spouts orrojections from any vessel to be heated. eflectors inside the acketcause the heated gases and flame to pass up ward otherwise thanvertically when desired.

The double jacket acts as insulation: and it has been found that it sogreatly prevents radiation outward of heat that a vessel of waterbrought to a boil within will keep'hot many hours after it would havebecome cold if unprotected. The deflectors may act as the distancepieces aforesaid. Means as doors a are provided or used for adjusting orregulating in some cases the draft entering under or near the foot ofthe jacket. The casing if stood on wet ground in the rain with the lidpartly open, still gives satisfactory results.

In describing the invention in further detail, reference will bemade tothe accompanying drawings which illustrate my improvements.

Figure 1 is a side elevation partly in vertical middle section, the lidbeing shown partly open; Fig. 2 shows a lan view of parts in Fig. 1, andFig. 3 a slig tly modified form of casing.

The parts lettered are: a the inside of the jacket, or inner wall. 12--the outside of the jacket, or outerwall. c a narrow space between partsa and I), closed except at upper air outlets and lower air inlets. d akettle or vessel to contain water to be boiled or for other use. 6-- anarrow space between vessel d and the jacket inner Wall. fprojectionsfrom wall a extending inwardly as guides and preventing vessel d beinglocated out of center so as to close space e at any side.

g closed base of jacket, or walls a and b. h collar to protect flame,and deflect draft, standing on bottom Z. 'i wide space between wall aand collar h, so that there shall be ample air way to the lamp flame andso that li uid spilled down space e shall fall clear of the amp or fuelto be placed within and extend above the upper part of collar h. j spacefor any suitable lamp, or

fuel and flame. 7c any suitable support for the vessel as cl. Thissupport is either attached to the lamp, or to collar h or to otherconvenient part. 1- casing bottom secured to the jacket base. ma sidedoor (with or without a mica ane to allow of observation from without)through walls a and b, or a slide giving access to the interior of thecasing. it aperture in lower part of wall a to let air enter space 0from the casing interior. These apertures are lower in some cases, as atn Fig. 3. v 0 apertures in upper part of wall a to let air leave space 0inwardly. The air in, and the; walls of space 0' will, when the lamp isalight, become heated, and prevent rapid cooling of the contents ofvessel cl when the flame is extinguished. 0 (Fig. 3) a higher locationwhich may be used of aperture for eXit of air from space 0. 19 anysuitable lamp or the like. r the lid of the casing. sa spout on vessel(Z. t obliquely or spirally set ribs inside jacket (1 to cause heat totravel upward otherwise than vertically. These ribs are shown acting asguides f. u air inlet apertures to space i at base of walls a and Z).

The draft is regulated by opening lid 1 to a greater or less extent, orpartially closing air inlets u in any convenient manner.

An important function of the collar h is to prevent strong wind or draftpassing from without to the lamp and flame direct, and to prevent sprayor rain driving thereto. The

, upward annular draft produced by the presence of collar h causes anannular form of flame which gives a desirable increase of heatingeffect. fuel and cooking utensils, some details above described may beomitted or altered while keeping within the scope of the invention, andthe design and pro ortions of the parts may vary, but what is i ustratedconstitutes In making casings for both,

an eflicient combination for general use. Thus some casings may bewithout lid 1' or door m; others may have several doors for access todiflerent parts of a suitable source of heat; and projections 0 at theedges of apertures 0 could act in place of parts 7 or t or both. N 0claim is made to any contained vessel (1 or its parts which vary atwill.

What I do claim as my invention and de sire to secure by Letters Patentof the United States is 1. A rotective casing for removable Vessels to eheated, having air inlets through its lower part to a source of heatspace, an outer wall, and connected thereto an inner wall provided withupper and lower air a ertures, said inner and outerwalls arrange to formguides or inward projections, and a narrow air space therebetween forproviding a heat non-conductor.

2. A protective casing for removable vessels to be heated, having airinlets through its lower part to a source of heat space, an outer wall,and connected thereto an inner wall provided with upper and lower airapertures, and with obliquely set inwardly projecting heat deflectors, anarrow air space being formed between the said walls.

3. The combination with a protective casing, for removable vessels to beheated, having air inlets at its lower part to a source of heat space,and having a double wall with an intermediate air space, the inner wallhaving upper and lower apertures, and suitable guldes, of a collar atthe casing base to direct the draft and flame.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

WILLIAM LITTLE.

Witnesses:

HENRY DUNSTAN, JAMES G. ANDERSON.

